A wire carrying a current of is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be . What is the magnetic force on the wire?

Ans: We are given the following:
Length of the wire,
Current flowing in the wire, .
Magnetic field,
Angle between the current and magnetic field,
Magnetic force exerted on the wire could be given as:

Substituting the given values, we get,

Therefore, the magnetic force on the wire is found to be and the direction of the force can be obtained using Fleming’s left-hand rule.